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The title complex was synthesized and structurally characterized by single-crystal X-ray diffraction. This complex was solved in the triclinic system, space group P1, with the following unit-cell parameters: a = 8.5657(4)Å, b = 10.9848(5)Å, c = 13.1681(6)Å, α = 112.617(1)°, β = 99.646(1)°, δ = 90.849(1)°, Z = 2, V = 1123.28(9)Å3. The final R value was R1 = 0.0344 for 15675 measured reflections. 2008 © The Japan Society for Analytical Chemistry  

The title complex has been synthesized and structurally characterized by single-crystal X-ray diffraction. This complex has a dinuclear structure where two copper(II) ions are bridged by two bent alkoxo groups. The citrate acts as a tetradentate ligand coordinating via three carboxylates and an alkoxo groups in which one of three carboxylates is coordinated weakly. The coordination geometry around the Cu(II) is strongly distorted square pyramidal. The distance between the two copper atoms is 2.8386(3)Å. 2007 © The Japan Society for Analytical Chemistry  

Charge-transfer (CT) complexes formed from the reactions of 4-nitropyrocatechol (4-nCat) as an electron acceptor with four amino alcohols: 2-aminoethanol, 1-amino-2-propanol, 4-aminobutanol and N-(2-hydroxyethyl)-1,3-diaminopropane (NHEDAP) as electron donors, have been studied spectrophotometrically in H2O and H2O/EtOH at 20, 25, 30, 35 and 40 °C. The calculated values of the oscillator strength and transition moment confirm the formation of CT-complexes. The thermodynamic and spectroscopic parameters were also evaluated for the formation of CT-complexes. The equilibrium constants ranged from 9.00 to 2.20 l mol-1 (M-1). These interactions are exothermic and have relatively large standard... 

In the title compound, the dihedral angles between the 2-amino-5-chloro- pyridyl rings and the pyridine ring are 56.26 (6)° and 78.83 (5)°; the angle between the 2-amino-5-chloro-pyridyl rings is 72.42 (5)°. The solvent water mol-ecules are linked to the organic compound by N - H⋯O, O - H⋯O, N - H⋯N and O - H⋯N hydrogen bonds. π⋯π Stacking inter-actions are also observed between the 2-amino-5-chloro-pyridyl rings (centroid⋯centroid distance = 3.243 Å). © 2008  

The asymmetric unit of the title compound, C14H 11BrN2O2, contains two independent mol-ecules connected into a dimer by inter-molecular N - H⋯O hydrogen bonds involving the amine and carbonyl groups. The dimers are further connected by O - H⋯O hydrogen bonds, forming chains running parallel to the a axis, which are stabilized through π-π stacking inter-actions, with a centroid-centroid distance of 3.679 (8) Å. The dihedral angle between the two aromatic rings is 89.2 (4)°  

Incorporation of calcium(ii), zinc(ii) and aluminium(iii) to manganese oxides greatly improved the activity of manganese oxide towards the epoxidation of olefins in the presence of anhydrous tert-butyl hydroperoxide as an oxidant  

A polymeric manganese(II) complex with the general formula [Mn(O 2CCH2NH2CH2CO2) 2(H2O)2]n from reaction of iminodiacetatic acid and manganese(II) perchlorate under nitrogen in water, was synthesized and characterized. The structure of the complex was determined using single-crystal X-ray diffraction, elemental analysis, IR and UV-vis spectra. This complex exhibited excellent catalytic activity and selectivity for oxidation of various alcohols and sulfides to the corresponding aldehydes/ketone and sulfoxides using urea hydrogen peroxide and oxone (2KHSO 5·KHSO4·K2SO4), respectively, as oxidants under air at room temperature. The easy preparation, mild reaction conditions, high yields of the... 

In the title compound [systematic name: 2-(3,4-dihydroxy-phen-yl) ethanaminium perchlorate], C8H12NO2 +·ClO4 -, the cations and anions are linked into three-dimensional structure via inter-molecular N - H⋯O and O - H⋯O hydrogen bonds. © 2008  

Ultra-small and highly dispersive (< 10 nm) iron oxide hydroxide is characterized by some methods. The compound is an efficient and stable catalyst for alcohol oxidation, organic sulfide oxidation, and epoxidation of alkenes in the presence of H2O2. The electrochemical oxygen-evolution reaction of the iron oxide hydroxide is also tested under acidic, neutral, and alkaline conditions. In the presence of the iron oxide hydroxide, excellent conversions (75–100%) and selectivities of substrates (92–97%), depending on the nature of the sulfide, were obtained. Benzylalcohols having electron-donating and-withdrawing substituents in the aromatic ring were oxidized to produce the corresponding... 

In this paper, we report that a known dinuclear Fe complex, [tpa(H2O)FeOFe(H2O)tpa](ClO4)4 (tpa: tris(2-pyridylmethyl)amine), is an efficient catalyst toward organic sulfide oxidation in the presence of urea-hydrogen peroxide